#------------------------------------------------------------------------------
# Copyright (c) 2012, Enthought, Inc.
# All rights reserved.
#------------------------------------------------------------------------------
from .qt.QtCore import Qt
from .qt.QtGui import QSlider
from .qt_control import QtControl
#: A map from Enaml constants to QSlider TickPosition values.
_TICK_POSITION_MAP = {
'no_ticks': QSlider.NoTicks,
'left': QSlider.TicksLeft,
'right': QSlider.TicksRight,
'top': QSlider.TicksAbove,
'bottom': QSlider.TicksBelow,
'both':QSlider.TicksBothSides
}
#: A map from Enaml enums to Qt constants for horizontal or vertical
#: orientation.
_ORIENTATION_MAP = {
'horizontal': Qt.Horizontal,
'vertical': Qt.Vertical
}
[docs]class QtSlider(QtControl):
""" A Qt implementation of an Enaml Slider.
"""
#--------------------------------------------------------------------------
# Setup Methods
#--------------------------------------------------------------------------
[docs] def create_widget(self, parent, tree):
""" Create the underlying QSlider widget.
"""
return QSlider(parent)
[docs] def create(self, tree):
""" Create and initialize the underlying widget.
"""
super(QtSlider, self).create(tree)
self.set_value(tree['value'])
self.set_maximum(tree['maximum'])
self.set_minimum(tree['minimum'])
self.set_orientation(tree['orientation'])
self.set_page_step(tree['page_step'])
self.set_single_step(tree['single_step'])
self.set_tick_interval(tree['tick_interval'])
self.set_tick_position(tree['tick_position'])
self.set_tracking(tree['tracking'])
self.widget().valueChanged.connect(self.on_value_changed)
#--------------------------------------------------------------------------
# Message Handlers
#--------------------------------------------------------------------------
[docs] def on_action_set_value(self, content):
""" Handle the 'set_value' action from the Enaml widget.
"""
self.set_value(content['value'])
[docs] def on_action_set_maximum(self, content):
""" Handle the 'set_maximum' action from the Enaml widget.
"""
self.set_maximum(content['maximum'])
[docs] def on_action_set_minimum(self, content):
""" Handle the 'set_minimum' action from the Enaml widget.
"""
self.set_minimum(content['minimum'])
[docs] def on_action_set_orientation(self, content):
""" Handle the 'set_orientation' action from the Enaml widget.
"""
self.set_orientation(content['orientation'])
[docs] def on_action_set_page_step(self, content):
""" Handle the 'set_page_step' action from the Enaml widget.
"""
self.set_page_step(content['page_step'])
[docs] def on_action_set_single_step(self, content):
""" Handle the 'set_single_step' action from the Enaml widget.
"""
self.set_single_step(content['single_step'])
[docs] def on_action_set_tick_interval(self, content):
""" Handle the 'set_tick_interval' action from the Enaml widget.
"""
self.set_tick_interval(content['tick_interval'])
[docs] def on_action_set_tick_position(self, content):
""" Handle the 'set_tick_position' action from the Enaml widget.
"""
self.set_tick_position(content['tick_position'])
[docs] def on_action_set_tracking(self, content):
""" Handle the 'set_tracking' action from the Enaml widget.
"""
self.set_tracking(content['tracking'])
#--------------------------------------------------------------------------
# Signal Handlers
#--------------------------------------------------------------------------
[docs] def on_value_changed(self):
""" Send the 'value_changed' action to the Enaml widget when the
slider value has changed.
"""
if 'value' not in self.loopback_guard:
content = {'value': self.widget().value()}
self.send_action('value_changed', content)
#--------------------------------------------------------------------------
# Widget Update Methods
#--------------------------------------------------------------------------
[docs] def set_value(self, value):
""" Set the value of the underlying widget.
"""
with self.loopback_guard('value'):
self.widget().setValue(value)
[docs] def set_maximum(self, maximum):
""" Set the maximum value of the underlying widget.
"""
self.widget().setMaximum(maximum)
[docs] def set_minimum(self, minimum):
""" Set the minimum value of the underlying widget.
"""
self.widget().setMinimum(minimum)
[docs] def set_orientation(self, orientation):
""" Set the orientation of the underlying widget.
"""
self.widget().setOrientation(_ORIENTATION_MAP[orientation])
[docs] def set_page_step(self, page_step):
""" Set the page step of the underlying widget.
"""
self.widget().setPageStep(page_step)
[docs] def set_single_step(self, single_step):
""" Set the single step of the underlying widget.
"""
self.widget().setSingleStep(single_step)
[docs] def set_tick_interval(self, interval):
""" Set the tick interval of the underlying widget.
"""
self.widget().setTickInterval(interval)
[docs] def set_tick_position(self, tick_position):
""" Set the tick position of the underlying widget.
"""
self.widget().setTickPosition(_TICK_POSITION_MAP[tick_position])
[docs] def set_tracking(self, tracking):
""" Set the tracking of the underlying widget.
"""
self.widget().setTracking(tracking)